The Insects of Australia: A Textbook for Students and Research Workers, Volume 1

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Page 28Body with 4 single or double rows of stout setae; size less than 5 mm; head
retractile; abdominal segments 1-8 each with a pair of small, ventral claws or
hooks (larval Micropterigidae) Lepidoptera Body without such rows of stout setae;
size ...

Page 153Primitive features include an abdominal pleuron incorporating SCX only (CX and
TR on the abdomen are separate podites not combined into SCX + CX + TR as in
Insecta, except on segment 9); presence of eyes on head segments 2-3 (as in ...